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Amish Adalja of John Hopkins in early March was asked about timing of social distancing measures. He said the negatives of shutting down (for instance) schools early (when a single case is confirmed in the relevant town/city/district) haven’t been presented. Whilst not normal in an influenza outbreak, it may be the best way now. To the best of our knowledge all you do is buy more time and learn lessons earlier in your epidemic. His opinion is one I heard echoed by other epidemic experts. It wasn’t controversial.
Interesting, but it seems to me it also suffers significantly from not being evidence-based either. Saying 'I'm right because I believe you're wrong' is more of a statement of faith than rigorous scientific analysis.